WO2022149360A1

WO2022149360A1 - Body-worn instrument providing tactile stimulation

Info

Publication number: WO2022149360A1
Application number: PCT/JP2021/042673
Authority: WO
Inventors: 直登山崎; 理沙水庭; 美由樹根本; 誠平原
Original assignee: 菱洋エレクトロ株式会社
Priority date: 2021-01-05
Filing date: 2021-11-19
Publication date: 2022-07-14
Also published as: JP2022105941A

Abstract

Provided is a body-worn instrument that is able to notify a user of a callout or an alert to the user by a means other than an auditory or visual means. This body-worn instrument, which includes an area at least a portion of which contacts the body of a user, has a sensor for detecting a callout or an alert to the user, and a tactile stimulation module that is integrated with the body-worn instrument. The tactile stimulation module reacts to a callout or an alert to the user, and provides a tactile stimulation to the area contacting the body of the user.

Description

Body wear that gives tactile stimulation

The present invention relates to a body-wearing device that gives a tactile stimulus. In particular, the present invention relates to a body-worn device capable of giving a tactile stimulus to a portion of contact with the user's body in response to a call or alert to the user.

In recent years, pressure-sensitive input devices such as touch panels have been adopted in a wide range of fields as interfaces for users to operate devices due to the advantage of being able to operate intuitively. In addition, the movement to replace touch panels is spreading to devices that have conventionally used physical buttons and keyboards.

An electronic device equipped with a touch panel may be equipped with a haptic actuator (hereinafter, also simply referred to as "actuator") that gives tactile feedback (haptic feedback) to the human body in combination with the touch panel. When a part of the user's body (eg, a finger) or an object operated by the user touches the input of an electronic device, or when the system generates a specific event, the haptic actuator is the housing or touch of the electronic device. Generate motion in components such as screens. The user can intuitively and easily operate the electronic device or receive information by perceiving the vibration at the part of the body that comes into contact with the electronic device or perceiving it as a sound.

Haptic actuators generally use electric power as a drive source, and can be roughly divided into impact drive type and vibration drive type according to the nature of motion. Typical examples of the impact drive type include SIA (Shape memory alloy Impact Actuator) using a shape memory alloy and a piezoelectric actuator using a piezo element. The impact-driven actuator includes a moving component capable of shocking movement, and gives a transient impact to the touch screen or housing of an electronic device by hitting or interlocking the moving component. Typical examples of vibration-driven actuators include ERM (Eccentric Rotating Mass) type actuators that use eccentric motors, and linear resonance type actuators (LRA: Linear Resnonant Actuator) that vibrate the mover by passing an alternating current through a coil in a magnetic field. Can be mentioned. The vibration-driven type gives a vibration of a constant amplitude to the vibrating body for the required time.

For example, in Patent Document 1 (International Publication No. 2012/023605), a horizontal (or planar direction) or vertical direction (front-back direction or Disclosed are shock-driven actuators that enable shocking movements (impact movements) in the thickness direction and rotational or straight-ahead movements based on repeated shocking movements. According to the impact-driven actuator, insulating heat conductors of various shapes are provided so as to be in contact with the wire-shaped shape memory alloy arranged in a predetermined wiring state as effectively as possible, and the insulating heat conduction is provided. Since the heat generated by the wire-shaped shape memory alloy during pulse energization is quickly dissipated and released by the body, the temperature of the wire-shaped shape memory alloy can be lowered quickly, and it can be repeated in a relatively short time. It is possible to realize a momentary operation that is possible, and it is possible to realize a highly practical impact-driven actuator.

In addition, a plurality of tactile feedback generation mechanisms may be installed so that a wide variety of tactile feedback patterns can be provided according to the operation on the user's touch panel and the display contents of the touch panel. For example, Patent Document 2 (Japanese Unexamined Patent Publication No. 2012-203895) discloses a touch panel device in which a piezoelectric vibration element is mounted on an upper portion and a lower portion of the smartphone under a glass substrate of the smartphone. Since the piezoelectric vibration elements are provided in two places, by controlling the amplitude and phase of the signal input to each, it is possible to induce a strong amplitude in a specific place in the plane of the protective panel 22, and a finger or the like can be used. It is possible to selectively vibrate the touched part.

International Publication No. 2012/023605 Japanese Unexamined Patent Publication No. 2012-203895

Conventionally, a function of giving tactile feedback has been installed in an electronic device from the viewpoint of more intuitive feedback of the operation of the electronic device by the user or more intuitive transmission of information from the electronic device to the user. .. However, if the user is absorbed in using the electronic device, or if the user's hearing or vision is disturbed by the use of the electronic device, the user cannot respond to the call or alert to himself, which causes inconvenience or danger. The use of haptic feedback has not been considered in terms of possible and mitigating such potential.

For example, when a user wears headphones and plays music, there is a possibility that the siren of a police car or ambulance cannot be heard due to the sound of the music and the sound insulation effect of the headphones. In addition, when the user wears a helmet and is at a construction site where there is a lot of noise, it may be difficult to hear a call or alert from another person. Unlike information terminals such as smartphones, such wearable devices have specific integrated functions (for example, music playback in the case of headphones and music playback in the case of helmets) rather than output of information to the user or input of information from the user. Since it has only head protection), it has not been considered to provide a tactile feedback system from the conventional viewpoint. However, since these wearable devices are used in an environment in which the user's hearing or vision is disturbed by themselves, it is desirable to provide a means for supplementing the user's hearing or vision in the wearable device.

The present invention has been completed in view of the above circumstances, and it is an object of the present invention to provide a body-worn device capable of notifying a user of a call or attention to a user by means other than auditory or visual means in one embodiment. And.

As a result of diligent studies by the present inventors, we focused on utilizing the advantages of tactile feedback from a viewpoint different from the conventional one, and installed a tactile stimulus module that responds to a user's call or attention to the body wearer. We have found a configuration that can notify the user of a call or alert to the user even when the user's hearing or vision is impaired, and have completed the present invention. Hereinafter, some embodiments of the present invention will be illustrated.
[1]
A body wearer that includes at least a portion of the body that comes into contact with the user's body.
It has a sensor that detects a call or attention to the user, and a tactile stimulus module integrated with the body wearer.
The tactile stimulus module responds to a call or alert to the user and gives a tactile stimulus to a portion of contact with the user's body.
Body wearer.
[2]
The body-worn device according to [1], wherein the tactile stimulus is given in a state where the user's hearing or vision is impaired.
[3]
The tactile stimulus module includes a control means for determining a tactile effect pattern according to the content of a call or attention to the user, and a tactile stimulus generating means for giving a tactile stimulus based on the tactile effect pattern [1] or. The body wearer according to [2].
[4]
The tactile stimulus module further includes a determination means for determining the importance of calling or alerting the user.
The body-worn device according to [3], wherein the tactile effect pattern is generated based on the importance of calling or calling attention to the user.
[5]
The sensor is a microphone installed on the body wearer, and the call or alert to the user is determined based on the voice information registered in advance, according to any one of [1] to [4]. Described body wearer.
[6]
Two or more of the tactile stimulus modules are installed in different parts of the body wearer, and the tactile stimulus is given by the tactile stimulus module in the part corresponding to the direction of calling or alerting the user. , The body wearing tool according to any one of [1] to [5].
[7]
The body-worn device according to any one of [1] to [6], further comprising a recording means for recording a call or alert to the user.
[8]
The body wearing tool according to any one of [1] to [7], which is a head wearing tool.
[9]
The body-worn device according to [8], which is a headphone.
[10]
The body-wearing device according to [8], which is a helmet.

According to one embodiment of the present invention, it is possible to provide a body-worn device capable of notifying the user of a call or alert to the user by means other than auditory or visual.

It is a structural schematic diagram of the body wearer 10 in one Embodiment of this invention. It is a block diagram which shows the operation method of the body wearer in one Embodiment of this invention. It is a flowchart which shows an example of the operation method of a voice recognition unit. It is a figure which shows an example of the detailed content of speech recognition in one Embodiment of this invention. It is a schematic diagram which shows the structure of the body wearer which is a headphone in one Embodiment of this invention. It is a figure which shows an example of the operation method of the tactile stimulation module 12 of the body wearer which is a headphone in one Embodiment of this invention.

Next, an embodiment of the present invention will be described in detail with reference to the drawings. It is understood that the present invention is not limited to the following embodiments, and design changes, improvements, etc. may be appropriately made based on ordinary knowledge of those skilled in the art without departing from the spirit of the present invention. Should be.

(1. Body wearer)
FIG. 1 is a schematic structural diagram of a body wearer 10 according to an embodiment of the present invention. The tactile stimulus module 12 is provided in an integrated state inside the outer shell of the body wearer 10 shown by the solid line portion, and is close to the tactile stimulus module 12 on the outside of the outer shell of the body wearer 10. Therefore, the sensor 14 is provided. The tactile stimulus module 12 and the sensor 14 are surrounded by a dotted line, and show the minimum configuration required to give a tactile stimulus in response to a call or alert to the user.

As long as at least a part of the body wearer comes into contact with the user's body, the wearing part is not particularly limited, and the body wearer is worn on the user's head, trunk, limbs, etc. according to the original function of the body wearer. can do. For example, if the body wearer is headphones, a helmet, or diving or swimming goggles, it is expected to be worn on the user's head. In one embodiment of the present invention, it is assumed that the body wearer is used in a state where the user's hearing or vision is disturbed, so that the body wearer is a head wearer.

(2. Sensor)
The sensor detects a call or alert to the user. The call or alert to the user may be a call or alert to an individual user, or may be a call or alert to an unspecified number of people including the user. For example, a call or alert to a user is, in one embodiment of the invention, a call for the user's name, and in another embodiment, an ambulance, fire engine, or police car siren, another embodiment. In form, it is a public transport announcement.

The type of sensor can be appropriately determined according to the environment in which the body wearer is used, and is not particularly limited, but typically, a microphone for acquiring sound information, a distance measuring sensor for acquiring distance information, and image information are acquired. It is a camera etc. As the sensor, only one type may be used, or a plurality of types of sensors may be used in combination.

When the sensor is a microphone, it is preferable to provide a noise filter that can remove unnecessary sounds from the sounds acquired by the microphone and extract human voices and sounds of a specific pattern (such as sirens).

(3. Tactile stimulation module)
The tactile stimulus module is integrated with the body wearer, specifically, is installed inside the outer shell of the body wearer or fixed to the outer shell of the body wearer. The tactile stimulus module responds to a call or alert to the user and provides a tactile stimulus to the site where the body wearer comes into contact with the user's body.

When a microphone is installed as a sensor for detecting a call or alert to a user, in order to determine whether or not the sound acquired by the microphone is a call or alert to the user, a predetermined voice information is tactile in advance. It is preferable to register it in the stimulus module. For example, when calling a user, the user's name, common name, etc. can be registered, and words normally used when calling a person (such as "Hey" and "Ano") can also be registered. , For alerting users, register ambulance, fire engine, or police car siren sounds, typical public transport announcement terms ("guidance", "repetition", "nuisance"), etc. Can be done. Furthermore, if the user's reaction is not required for some of the public transportation announcements, only the announcements satisfying certain conditions can be notified to the user. For example, if the same phrase is repeatedly broadcast, or if the announcement in a foreign language is not broadcast, it is judged that the urgency is high, and only these announcements can be notified to the user through tactile stimulation.

Alternatively, the tactile stimulus module can be configured to give a tactile stimulus regardless of the content when the voice of a specific person is registered and the voice of the person is detected by voiceprint recognition or the like. The predetermined voice information as described above can be recorded in a storage device composed of a hard disk (HD), a ROM, a RAM, or the like, which is provided inside the tactile stimulus module or independently of the tactile stimulus module. ..

In one embodiment of the present invention, the tactile stimulus module includes a control means for determining a tactile effect pattern in response to a call to a user or an alert, and a tactile stimulus generating means for giving a tactile stimulus based on the tactile effect pattern.

The control means determines a predetermined tactile effect pattern in response to a call or alert to the user detected by the sensor, and in response, generates a signal such as a pulse voltage for driving the tactile generating means. This is transmitted to the tactile generating means. In one embodiment, the control means may include an amplifier configured to generate a drive signal, or more generally a drive circuit. In one embodiment, the control means is one or more processors or processor cores, a programmable logic array (PLA) or programmable logic circuit (PLC), a field programmable gate array (FPGA), an application-specific integrated circuit (ASIC), and the like. It may include a microcontroller, or any other control circuit. If the controller includes a processor, the processor may be a general purpose processor such as a general purpose processor on a mobile phone or other end user device, or it may be a processor dedicated to producing haptic effects.

In one embodiment of the present invention, the control means can determine various tactile effect patterns (strength, duration, vibration waveform, etc.) according to the content of calling or alerting the user. These tactile effect patterns may be calculated each time based on a predetermined algorithm, or may be predefined in a storage device including a hard disk (HD), a ROM, a RAM, or the like. In one embodiment, the tactile effect pattern can be arbitrarily set or changed by the user by an input means provided on the body wearer or software linked to the body wearer.

The content of the call or alert to the user is a human voice or other sound, whether it is for an individual user or an unspecified number of people, or a specific keyword ("emergency", "earthquake", "fire"). It is possible to classify into several types depending on whether or not they are included, and it is possible to register the tactile effect pattern corresponding to each in advance. By giving a tactile effect pattern corresponding to the content of the call or alert, the user can predict the content of the call or alert to a certain extent, and immediately and appropriately before actually listening to the content of the call or alert. It is possible to react to.

In one embodiment of the present invention, the tactile stimulus module further includes a determination means for determining the importance of calling or calling attention to the user. The determination means may be realized by the same components as the control means, or may be components independent of the control means.

As a criterion for determining the importance of calling or calling, the distance between the user or the person or object calling or calling to the user and the volume of the calling or calling can be considered. For example, when a microphone installed on a body-mounted device detects an ambulance siren, a camera or a distance measuring sensor separately installed on the body-mounted device captures the ambulance and detects the distance between the user and the ambulance. When the distance between the user and the ambulance is within a certain standard, the determination means determines that the siren is of high importance and transmits the determination result to the control means.

Alternatively, when the microphone installed on the body wearer detects an ambulance siren, the determination means is based on the characteristics of the siren's sound (whether it is higher or lower than normal frequency, louder or quieter). , It is conceivable to determine whether the ambulance is approaching or moving away from the user. When the ambulance is approaching the user, the determination means determines that the siren is of high importance and transmits the determination result to the control means.

When the control means receives the judgment result from the judgment means, the control means determines the tactile effect pattern corresponding to the siren of high importance. For example, when the tactile effect pattern corresponding to the siren is registered in advance, the tactile effect pattern is driven stronger than usual or repeated more times than usual in order to show the user that the importance is high. Can be considered. This allows the user to react immediately and appropriately to the perceived tactile effect pattern before actually hearing the content of the call or alert.

Alternatively, when the microphone installed in the body wearer detects the call of the user's name, the determination means determines the characteristics of the voice of the call (high or low tone, loudness of sound amplitude is larger or smaller than usual). From (), it is conceivable to determine the importance of the call. For example, when the tone of the voice is high and larger than usual, the determination means determines that the call is of high importance and transmits the determination result to the control means.

When the control means receives the judgment result from the judgment means, the control means determines the tactile effect pattern corresponding to the highly important call. For example, when a tactile effect pattern corresponding to a user's name call is registered in advance, the tactile effect pattern is driven stronger than usual or more than usual in order to show the user that the importance is high. It can be repeated by the number of times. This allows the user to react immediately and appropriately to the perceived tactile effect pattern before actually hearing the content of the call.

As described above, the tactile stimulus is a tactile stimulus because the present invention can notify the user by means other than auditory or visual means in a state where the auditory or visual sense of the user is impaired. It is preferably given in a state where the hearing or vision of the person is impaired. For example, when the body wearer is headphones, the control means is activated while the user is playing music, and the control means is not activated while the music playback is stopped, giving the user a tactile stimulus. Can be absent. Also, if the body wearer is a helmet, the control means will operate while the ambient noise exceeds a certain level, otherwise the control means will not operate and will not give a tactile stimulus to the user. You can also.

In one embodiment of the present invention, two or more tactile stimulus modules are installed in different parts of the body wearer, and are located in the parts corresponding to the directions in order to inform the user of the direction of calling or calling attention. The tactile stimulus module is configured to provide tactile stimuli. For example, if the body wearer is headphones, one microphone and one tactile stimulus module can be mounted on the left ear pad and the right ear pad, respectively, and if there is a call or alert to the user, the control means. Determines whether the call or alert is on the left side or the right side of the user based on the time difference between the sounds acquired by the two microphones, and depending on the judgment result, the tactile generating means on the left side or the tactile sensation on the right side. It is possible to drive only the means, thereby informing the user of the direction of the call or alert.

The tactile generating means can be provided with an arbitrary actuator that actually generates various tactile effect patterns. Both a shock-driven actuator and a vibration-driven actuator can be used for the present invention. Typical examples of the impact drive type include SIA (Shape memory alloy Impact Actuator) using a shape memory alloy and a piezoelectric actuator using a piezo element. The impact-driven actuator includes a moving component capable of shocking movement, and gives a transient impact to the touch screen or housing of an electronic device by hitting or interlocking the moving component. Typical examples of vibration-driven actuators include ERM (Eccentric Rotating Mass) type actuators that use eccentric motors, and linear resonance type actuators (LRA: Linear Resnonant Actuator) that vibrate the mover by passing an alternating current through a coil in a magnetic field. Can be mentioned. The vibration-driven type gives a vibration of a constant amplitude to the vibrating body for the required time. In one embodiment, a plurality of actuators can be used to generate various tactile effect patterns, and one or more shock-driven and vibration-driven types can be used in combination.

For example, the actuator of the tactile sensation generating means in one embodiment of the present invention is made of a coil, an operating component (for example, a metal core material) and a spring. The coil is wound around the metal (where both the coil and the metal component may be referred to as "solenoids") and when the coil creates a magnetic field (eg, when a current flows between the coil terminals). ) The metal moves. The movement of the metal can have an impact on the electronic device. The spring may then be used to return the moving metal or other core material to a stationary position when the current is removed from the coil.

Alternatively, the impact-driven actuator in another embodiment has a wire-shaped shape memory alloy that contracts when energized and heated, and a disk-shaped insulating property that comes into contact with the wire-shaped shape memory alloy and releases heat generated by the wire-shaped shape memory alloy. It is configured to include a thermal conductor (moving component). When the wire-shaped shape memory alloy is momentarily energized by the drive circuit and the wire-shaped shape memory alloy is momentarily shrunk, the disk-shaped insulating thermal conductor in contact with the wire-shaped shape memory alloy is momentarily pressed. Displace. The displacement of the disk-shaped insulating thermal conductor can cause an impact on the electronic device. Then, the heat generated by the wire-shaped shape memory alloy is rapidly dissipated by the heat conduction action of the disk-shaped insulating heat conductor, and as a result, the wire-shaped shape memory alloy immediately returns to the original length state (extended state). .. In this way, the wire-shaped shape memory alloy can be momentarily shrunk at relatively short time intervals. Details of such actuators are disclosed in International Publication No. 2012/023605.

(4. Recording means)
Further, in one embodiment of the present invention, the body-worn device preferably has a recording means for recording a call or alert to the user. According to the above configuration of the present invention, when there is a call or alert to the user, the user can be alerted to the call or alert by giving a tactile stimulus to the user. There may be a time lag between the occurrence of a call or alert and the reaction of the user, which may cause the user to overlook important information. Therefore, it is preferable to install a recorder for recording the user's call or attention on the body wearing device so that the user can re-listen to the user's call or attention.

Specifically, when a microphone is installed as a sensor to detect a call or alert to the user, all the sounds acquired by the microphone or the sound after noise is removed are recorded, and the sound is recorded according to the user's operation. It is conceivable to play. The recorded data may be stored and stored, and if there is a limit on the capacity of the storage medium, the recorded data is stored only for the most recent fixed period (for example, 10 seconds), and no call or alert is detected. If so, it is possible to delete the recording on a regular basis.

FIG. 2 is a block diagram showing a method of operating a body wearer according to an embodiment of the present invention. The microphone acquires sound from the external environment of the body-worn device, and the noise filter removes unnecessary sound from the sound acquired by the microphone, and extracts a human voice or a specific pattern of sound (such as a siren). With respect to the extracted sound, the voice recognition unit, which is a determination means, identifies whether or not the sound is directed to the user, and further identifies the importance of the sound and transmits the sound to the control means. The control means has a position identification function, an adjustment function, and a notification function. The position specifying function is a function of estimating the direction or distance of calling or calling attention to the user by using a microphone or a distance measuring sensor. The adjustment function is a function of determining a tactile effect pattern according to the content of a call or alert to the user. The notification function is a function of generating a signal such as a pulse voltage for driving the tactile sensation generating means so that the determined haptic effect pattern is generated. An actuator, which is a tactile sensation generating means, is driven by a driving signal generated from the control means to generate a predetermined tactile effect pattern and give a tactile stimulus to the user.

FIG. 3 is a flowchart showing an example of how to operate the voice recognition unit. Information such as sound from the outside of the body wearer is detected by the sensor, and noise unrelated to the call or alert is removed. When the extracted sound is larger than a predetermined threshold value, it is determined whether or not the sound is directed to the user, and the importance of the sound. Corresponding to the identified sound, the tactile effect module generates a predetermined tactile effect pattern (stimulation).

FIG. 4 is a diagram showing an example of the detailed contents of voice recognition. The voice recognition unit analyzes the noise-removed sound to identify what kind of sound is included. If an ambulance siren is included, determine if the sound is higher or lower than normal. If the siren sounds higher than normal (ie, an ambulance is approaching), the tactile effect module will generate more vibration. If the siren sounds lower than normal (ie, the ambulance is moving away), the tactile effect module will generate less vibration. If in-vehicle announcements are included, the tactile effect module will vibrate. If a call to the user is included, it is determined whether the volume of the voice of the call is louder than a certain standard, and if the volume is higher than the standard, the tactile effect module generates a larger vibration and is below the standard. At volume, the tactile effect module produces less vibration.

(5. Exemplary embodiments)
FIG. 5 is a schematic view showing the configuration of a body wearer which is a headphone in one embodiment of the present invention. In the headphones, one microphone 14 and one tactile stimulation module 12 are installed on the left ear pad and the right ear pad, respectively, and the actuator 121 is shown as a part of the tactile stimulation module 12. In order to satisfactorily transmit the vibration of the actuator 121 to the user, the two actuators 121 are installed at the headphone portion corresponding to the vicinity of the user's temples (FIG. 5A). Two microphones 14 and two distance measuring sensors 16 are installed behind the headphones, and it is possible to detect the direction and distance of calling or calling attention to the user (FIG. 5B).

FIG. 6 is a diagram showing an example of an operation method of the tactile stimulation module 12 of a body-worn device which is a headphone in one embodiment of the present invention. The configuration of the headphones is the same as that of the embodiment of FIG. While wearing headphones and playing music, the user is called "Hey Hey" by another person on the left side (Fig. 6A). When the microphone 14 installed in the headphones detects this call, the tactile stimulus module 12 operates after determining that the call comes from the left side, and generates a predetermined tactile effect pattern in the actuator 121 on the left side. Notify the user (FIG. 6B).

Although the preferred embodiments of the present invention have been described above, the specific features of the respective embodiments disclosed in the present specification are not independent of each other, and those skilled in the art will not deviate from the gist of the present invention. It should be understood that it can be combined appropriately based on ordinary knowledge.

10 Body wearer 12 Tactile stimulation module 121 Actuator 14 Sensor (microphone)
16 Distance measurement sensor

Claims

A body wearer that includes at least a portion of the body that comes into contact with the user's body.
It has a sensor that detects a call or attention to the user, and a tactile stimulus module integrated with the body wearer.
The tactile stimulus module responds to a call or alert to the user and gives a tactile stimulus to a portion of contact with the user's body.
Body wearer.
The body-worn device according to claim 1, wherein the tactile stimulus is given in a state where the user's hearing or vision is impaired.
The tactile stimulus module includes a control means for determining a tactile effect pattern according to the content of a call or attention to the user, and a tactile stimulus generating means for giving a tactile stimulus based on the tactile effect pattern. The body wearing tool according to 2.
The tactile stimulus module further includes a determination means for determining the importance of calling or alerting the user.
The body-worn device according to claim 3, wherein the tactile effect pattern is generated based on the importance of calling or calling attention to the user.
The method according to any one of claims 1 to 4, wherein the sensor is a microphone installed on the body wearer, and the call or alert to the user is determined based on the voice information registered in advance. Body wearer.
Two or more of the tactile stimulus modules are installed in different parts of the body wearer, and the tactile stimulus is given by the tactile stimulus module in the part corresponding to the direction of calling or alerting the user. , The body wearing device according to any one of claims 1 to 5.
The body wearing device according to any one of claims 1 to 6, further comprising a recording means for recording a call or alert to the user.
The body wearing tool according to any one of claims 1 to 7, which is a head wearing tool.
The body-worn device according to claim 8, which is a headphone.
The body wearing device according to claim 8, which is a helmet.